# Third-Party Notices

Viridithas is licensed under the GNU Affero General Public License v3.0 (see `LICENSE`).
It incorporates the following components under their own, AGPLv3-compatible terms.
These notices must be retained in source and binary distributions.

## Pyrrhic / Fathom: Syzygy tablebase probing (`deps/pyrrhic/`)

Licensed under the MIT License. See also `deps/pyrrhic/LICENSE`.

    Copyright (c) 2013-2020 Ronald de Man
    Copyright (c) 2015 basil, all rights reserved
    Modifications Copyright (c) 2016-2019 by Jon Dart
    Modifications Copyright (c) 2020-2024 by Andrew Grant

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.

## Terminal size detection (`src/term.rs`)

Licensed under the MIT License. The full notice is retained in the file header.

    Copyright (c) 2014 Benjamin Sago

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all
    copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.

## Neural network weights

The neural network weights embedded in Viridithas (the `.nnue` / `.nnue.zst`
files, hosted in the [viridithas-networks](https://github.com/cosmobobak/viridithas-networks)
repository) are dedicated to the public domain under
[Creative Commons CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/).

## Historical note

Prior to version 20.0.0, Viridithas was distributed under the MIT License.
Contributions made before the relicense were licensed under the MIT License,
which permits their inclusion in this AGPLv3-licensed work; those earlier
releases remain available under the MIT License.